Golang Request.String方法代码示例

// Do acts as a switchboard for remote command execution
func (c *RPCConnection) Do(cmd datastore.Request, reply *datastore.Response) error {
	if reply == nil {
		dvid.Debugf("reply is nil coming in!\n")
		return nil
	}
	if cmd.Name() == "" {
		return fmt.Errorf("Server error: got empty command!")
	}

	switch cmd.Name() {

	case "help":
		reply.Text = fmt.Sprintf(RPCHelpMessage, config.RPCAddress(), config.HTTPAddress())

	case "shutdown":
		Shutdown()
		// Make this process shutdown in a second to allow time for RPC to finish.
		// TODO -- Better way to do this?
		log.Printf("DVID server halted due to 'shutdown' command.")
		reply.Text = fmt.Sprintf("DVID server at %s has been halted.\n", config.RPCAddress())
		go func() {
			time.Sleep(1 * time.Second)
			os.Exit(0)
		}()

	case "types":
		if len(cmd.Command) == 1 {
			text := "\nData Types within this DVID Server\n"
			text += "----------------------------------\n"
			mapTypes, err := datastore.Types()
			if err != nil {
				return fmt.Errorf("Error trying to retrieve data types within this DVID server!")
			}
			for url, typeservice := range mapTypes {
				text += fmt.Sprintf("%-20s %s\n", typeservice.GetTypeName(), url)
			}
			reply.Text = text
		} else {
			if len(cmd.Command) != 3 || cmd.Command[2] != "help" {
				return fmt.Errorf("Unknown types command: %q", cmd.Command)
			}
			var typename string
			cmd.CommandArgs(1, &typename)
			typeservice, err := datastore.TypeServiceByName(dvid.TypeString(typename))
			if err != nil {
				return err
			}
			reply.Text = typeservice.Help()
		}

	case "repos":
		var subcommand, alias, description, uuidStr string
		cmd.CommandArgs(1, &subcommand, &alias, &description, &uuidStr)
		switch subcommand {
		case "new":
			var assign *dvid.UUID
			if uuidStr == "" {
				assign = nil
			} else {
				u := dvid.UUID(uuidStr)
				assign = &u
			}
			root, err := datastore.NewRepo(alias, description, assign)
			if err != nil {
				return err
			}
			if err := datastore.SetRepoAlias(root, alias); err != nil {
				return err
			}
			if err := datastore.SetRepoDescription(root, description); err != nil {
				return err
			}
			reply.Text = fmt.Sprintf("New repo %q created with head node %s\n", alias, root)
		default:
			return fmt.Errorf("Unknown repos command: %q", subcommand)
		}

	case "repo":
		var uuidStr, subcommand string
		cmd.CommandArgs(1, &uuidStr, &subcommand)
		uuid, _, err := datastore.MatchingUUID(uuidStr)
		if err != nil {
			return err
		}

		switch subcommand {
		case "new":
			var typename, dataname string
			cmd.CommandArgs(3, &typename, &dataname)

			// Get TypeService
			typeservice, err := datastore.TypeServiceByName(dvid.TypeString(typename))
			if err != nil {
				return err
			}

			// Create new data
			config := cmd.Settings()
			_, err = datastore.NewData(uuid, typeservice, dvid.InstanceName(dataname), config)
//.........这里部分代码省略.........

// switchboard for remote command execution
func handleCommand(cmd *datastore.Request) (reply *datastore.Response, err error) {
	if cmd.Name() == "" {
		err = fmt.Errorf("Server error: got empty command!")
		return
	}
	reply = new(datastore.Response)

	switch cmd.Name() {

	case "help":
		reply.Text = fmt.Sprintf(RPCHelpMessage, config.RPCAddress(), config.HTTPAddress())

	case "shutdown":
		dvid.Infof("DVID server halting due to 'shutdown' command.")
		reply.Text = fmt.Sprintf("DVID server at %s is being shutdown...\n", config.RPCAddress())
		// launch goroutine shutdown so we can concurrently return shutdown message to client.
		go Shutdown()

	case "types":
		if len(cmd.Command) == 1 {
			text := "\nData Types within this DVID Server\n"
			text += "----------------------------------\n"
			var mapTypes map[dvid.URLString]datastore.TypeService
			if mapTypes, err = datastore.Types(); err != nil {
				err = fmt.Errorf("Error trying to retrieve data types within this DVID server!")
				return
			}
			for url, typeservice := range mapTypes {
				text += fmt.Sprintf("%-20s %s\n", typeservice.GetTypeName(), url)
			}
			reply.Text = text
		} else {
			if len(cmd.Command) != 3 || cmd.Command[2] != "help" {
				err = fmt.Errorf("Unknown types command: %q", cmd.Command)
				return
			}
			var typename string
			var typeservice datastore.TypeService
			cmd.CommandArgs(1, &typename)
			if typeservice, err = datastore.TypeServiceByName(dvid.TypeString(typename)); err != nil {
				return
			}
			reply.Text = typeservice.Help()
		}

	case "repos":
		var subcommand string
		cmd.CommandArgs(1, &subcommand)

		switch subcommand {
		case "new":
			var alias, description string
			cmd.CommandArgs(2, &alias, &description)

			config := cmd.Settings()
			var uuidStr, passcode string
			var found bool
			if uuidStr, found, err = config.GetString("uuid"); err != nil {
				return
			}
			var assign *dvid.UUID
			if !found {
				assign = nil
			} else {
				uuid := dvid.UUID(uuidStr)
				assign = &uuid
			}
			if passcode, found, err = config.GetString("passcode"); err != nil {
				return
			}
			var root dvid.UUID
			root, err = datastore.NewRepo(alias, description, assign, passcode)
			if err != nil {
				return
			}
			if err = datastore.SetRepoAlias(root, alias); err != nil {
				return
			}
			if err = datastore.SetRepoDescription(root, description); err != nil {
				return
			}
			reply.Text = fmt.Sprintf("New repo %q created with head node %s\n", alias, root)

		case "delete":
			var uuidStr, passcode string
			cmd.CommandArgs(2, &uuidStr, &passcode)

			var uuid dvid.UUID
			if uuid, _, err = datastore.MatchingUUID(uuidStr); err != nil {
				return
			}
			if err = datastore.DeleteRepo(uuid, passcode); err != nil {
				return
			}
			reply.Text = fmt.Sprintf("Started deletion of repo %s.\n", uuid)

		default:
			err = fmt.Errorf("Unknown repos command: %q", subcommand)
			return
//.........这里部分代码省略.........